EP2596760A1 - Dentalgerät - Google Patents

Dentalgerät Download PDF

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Publication number
EP2596760A1
EP2596760A1 EP12193787.4A EP12193787A EP2596760A1 EP 2596760 A1 EP2596760 A1 EP 2596760A1 EP 12193787 A EP12193787 A EP 12193787A EP 2596760 A1 EP2596760 A1 EP 2596760A1
Authority
EP
European Patent Office
Prior art keywords
rotary
output
input
shaft part
rotary body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12193787.4A
Other languages
English (en)
French (fr)
Inventor
Tetsuya Aida
Yuichi Shibata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nakanishi Inc
Original Assignee
Nakanishi Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nakanishi Inc filed Critical Nakanishi Inc
Publication of EP2596760A1 publication Critical patent/EP2596760A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00—Dental tools or instruments
    • A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/18—Flexible shafts; Clutches or the like; Bearings or lubricating arrangements; Drives or transmissions
    • A61C1/185—Drives or transmissions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/02—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools
    • A61C1/07—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools with vibratory drive, e.g. ultrasonic

Definitions

  • the present invention relates to a dental handpiece, in particular, a dental handpiece which gives a reciprocating rotating motion to a cutting tool.
  • the power transmission means 73 is provided integrally at one end of the first rotary shaft 721, and includes semispherical concave surface 730 which is engageable with the proximal semispherical surface of the rotary body 713, and guide pin 731 protruding from the semispherical concave surface 730 at an eccentric position and extending toward the center of the rotary body 713, when assembled, at an angle with respect to the rotary axis of the first rotary shaft 721.
  • the guide pin 731 engages in the guide groove 716 of the rotary body 713.
  • the reciprocal rotation mechanism 8 of the conventional dental handpiece has drawbacks. Due to the generally spherical shape of the rotary body 713, the depth of the guide groove 716 provided as a vertical arc in the spherical surface is limited by the vertical through hole 715. In particular, the portions of the guide groove 716 near the rotary shafts 714, 714 cannot be given a sufficient depth for the guide pin 731 to engage in, and thus the range of the guide groove 716 over which the guide pin 731 can engage is naturally limited. This poses limitation on the angle of the guide pin 731, so that the turning angle of the cutting tool in the reciprocating rotating motion is about 80° at most, and cannot be made larger.
  • a dental handpiece having a head in which a cutting tool is attached, a neck extending proximally from the head, and a grip connected to the neck at its distal end and to a drive unit at its proximal end, wherein said head contains rotary means for rotating the cutting tool, said neck contains a first rotary shaft extending therein, and said grip contains a second rotary shaft extending therein, wherein said rotary means, said first rotary shaft, and said second rotary shaft are operatively linked in this order to transmit driving force from the drive unit to the cutting tool, wherein said second rotary shaft has an input-side shaft part and an output-side shaft part, and reciprocal rotation means is interposed between said input-side shaft part and said output-side shaft part, said reciprocal rotation means comprising:
  • the term "reciprocal rotation” and its derivatives means a twisting motion around an axis for a predetermined turning angle, and the direction of rotation changes in turn between the forward and reverse directions.
  • Fig. 1 shows the overall structure of dental handpiece H according to the present invention
  • Figs. 2 and 3 show the main part structure of the handpiece H.
  • the reciprocal rotation mechanism 4 includes rotary body 40 of a generally spherical shape, input-side semispherical concave surface 41 formed at one end of the input-side shaft part 361, input-side guide pin 411 protruding from the input-side semispherical concave surface 41, output-side semispherical concave surface 42 formed at one end of the output-side shaft part 362, and output-side guide pin 421 protruding from the output-side semispherical concave surface 42.
  • the rotary body 40 has upper rotary shaft 403 and lower rotary shaft 404 each projecting outwards along the central vertical axis of the body 40, and input-side guide groove 401 and output-side guide groove 402 each extending in the surface of the rotary body 40 in the form of a vertical arc between the upper and lower rotary shafts 405 and 404.
  • the input- and output-side guide grooves 401 and 402 are not necessarily formed all the way from the upper rotary shaft 403 to the lower rotary shaft 404, and may be spaced from each shaft 403, 404, as long as the two grooves 401 and 402 are on a single imaginary circle having its center at the center of the rotary body 40.
  • the guide grooves 401 and 402 of the rotary body 40 may be formed in any desired depth in the sphere of the rotary body 40. This allows enlargement of the angle ranges of the guide pins 411 and 421 with respect to the rotary axis of the input- and output-side rotary shafts 361 and 362, respectively, and the angles of the pins 411 and 421 may suitably be set depending on the desired turning angle of the cutting tool.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
EP12193787.4A 2011-11-24 2012-11-22 Dentalgerät Withdrawn EP2596760A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011255827A JP2013106871A (ja) 2011-11-24 2011-11-24 歯科用ハンドピース

Publications (1)

Publication Number Publication Date
EP2596760A1 true EP2596760A1 (de) 2013-05-29

Family

ID=47221975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12193787.4A Withdrawn EP2596760A1 (de) 2011-11-24 2012-11-22 Dentalgerät

Country Status (3)

Country Link
US (1) US20130137060A1 (de)
EP (1) EP2596760A1 (de)
JP (1) JP2013106871A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017064138A1 (en) * 2015-10-12 2017-04-20 Bien-Air Holding Sa Surgical contra-angle drilling device for cutting bone preventing injuries to soft tissues
CN107260332A (zh) * 2017-06-19 2017-10-20 天津大学 一种超声振动旋转牙科直手机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015004658A1 (en) * 2013-07-11 2015-01-15 Epstein Naftali An articulated dental apparatus
CN114224524A (zh) * 2021-11-16 2022-03-25 苏州微创畅行机器人有限公司 种植手机及牙科种植手术机器人及种植手机机头调节方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1090302A (en) * 1964-03-17 1967-11-08 Micro Mega Sa Dental handpieces
US4111208A (en) * 1976-12-22 1978-09-05 Roland Leuenberger Process for drilling holes in hard materials, in surgical procedures, and apparatus for carrying out the process
US4460341A (en) * 1981-05-08 1984-07-17 Nakanishi Dental Mfg. Co., Ltd. Dental handpiece
US4718851A (en) * 1985-11-15 1988-01-12 Kaltenbach & Voigt Gmbh & Co. Handpiece, especially for dental purposes
JPH08243113A (ja) * 1995-03-14 1996-09-24 Morita Tokyo Seisakusho:Kk 磁気軸継ぎ手及び同継ぎ手を備えた歯科用電動ハンドピース
JP2002035010A (ja) 2000-07-24 2002-02-05 Manii Kk 歯科用ハンドピース

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2100319A (en) * 1932-06-07 1937-11-30 Harold J Brown Dental or surgical instrument
FR1397366A (fr) * 1968-05-06 1965-04-30 Micro Mega Sa Procédé pour l'entraînement des outils dentaires à canaux et contre-angle de dentisterie pour la mise en oeuvre de ce procédé
FR2255041B1 (de) * 1973-12-24 1977-06-10 Hirdes Rudigar
US4008521A (en) * 1974-08-12 1977-02-22 Baumayr Instrument Co., Inc. Dental tools
US4371341A (en) * 1981-04-13 1983-02-01 Nakanishi Dental Mfg. Co. Ltd. Dental handpiece
US20030226223A1 (en) * 2002-06-11 2003-12-11 The Procter & Gamble Co. High efficiency electric toothbrush
US7311108B2 (en) * 2003-10-09 2007-12-25 The William Getgey Company, Inc. Motorized flosser and method of use
US7360269B2 (en) * 2004-01-02 2008-04-22 Sonicscrubbers, Llc Cleaning apparatus with reciprocating brush head
JP5645447B2 (ja) * 2010-04-09 2014-12-24 株式会社モリタ製作所 医科歯科用ハンドピース

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1090302A (en) * 1964-03-17 1967-11-08 Micro Mega Sa Dental handpieces
US4111208A (en) * 1976-12-22 1978-09-05 Roland Leuenberger Process for drilling holes in hard materials, in surgical procedures, and apparatus for carrying out the process
US4460341A (en) * 1981-05-08 1984-07-17 Nakanishi Dental Mfg. Co., Ltd. Dental handpiece
US4718851A (en) * 1985-11-15 1988-01-12 Kaltenbach & Voigt Gmbh & Co. Handpiece, especially for dental purposes
JPH08243113A (ja) * 1995-03-14 1996-09-24 Morita Tokyo Seisakusho:Kk 磁気軸継ぎ手及び同継ぎ手を備えた歯科用電動ハンドピース
JP2002035010A (ja) 2000-07-24 2002-02-05 Manii Kk 歯科用ハンドピース

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017064138A1 (en) * 2015-10-12 2017-04-20 Bien-Air Holding Sa Surgical contra-angle drilling device for cutting bone preventing injuries to soft tissues
CN107260332A (zh) * 2017-06-19 2017-10-20 天津大学 一种超声振动旋转牙科直手机
CN107260332B (zh) * 2017-06-19 2019-11-01 天津大学 一种超声振动旋转牙科直手机

Also Published As

Publication number Publication date
US20130137060A1 (en) 2013-05-30
JP2013106871A (ja) 2013-06-06

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